Registry Mechanic™ 6.0 for Windows

Registry Mechanic Feature Highlights:
- Repair invalid registry entries that are a common cause of Windows crashes and error messages
- Optimize your system by compacting the wasted space and gaps in the registry
- Increase system speed and stability by removing orphaned references
- Scans your hard drive for invalid and incorrect program shortcuts
- Safely make backups of any registry change made by Registry Mechanic
- Works with Windows XP, Me, 98, 95, NT and 2000
- Unlimited free upgrades and e-mail technical support for one year.
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Note:Can't seem to find a changelog of the new version,i found on their website
Link:http://www.pctools.com/registry-mechanic/